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SOIL MASS BALANCE—TPH-G AND BENZENE <br /> NEW JERUSALEM SCHOOL <br /> TRACY, CALIFORNIA j <br /> Assumptions <br /> • Soil in cylindrical zone <br /> • Cylinder measures 6' thick, 8' diameter 4 <br /> Soil Density = 50 kg/ft' <br /> • Concentration of TPH-G 37 mg/kg based upon tank pull data <br /> • Concentration of Benzene 0.21 mg/kg based on AGE'S P-2 - 10' sample analysis <br /> I <br /> j TPH-G BENZENE <br /> i <br /> V =7Lr' h t <br /> V= 3.14x 16ft2x6ft <br /> V= 301.4 ft' <br /> 301.4 ft- x 50 kg/ft' = 15,072 kg E <br /> 15,072 kg x 37 mg/kg= 557,664 mg 15,072 kg x 0.21 mg/kg = 3,165 mg i <br /> i <br /> i <br /> TOTAL <br /> g <br /> TPH-G —0.6 kg . <br /> —enzen <br /> Be 32 rams <br /> i <br /> i <br /> M <br /> a <br /> I <br /> r <br /> { <br /> i <br /> f <br /> r <br />